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List.walk in zig

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This commit is contained in:
Folkert 2021-02-17 17:37:06 +01:00
parent 7aceb8dc70
commit 56427c5fac
7 changed files with 193 additions and 255 deletions
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51
compiler/builtins/bitcode/src/utils.zig
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@ -22,13 +22,6 @@ pub fn decref(
const refcount_isize = @bitCast(isize, refcount);
switch (alignment) {
8 => {
if (refcount == REFCOUNT_ONE) {
allocator.free((bytes - 8)[0 .. 8 + data_bytes]);
} else if (refcount_isize < 0) {
(usizes - 1)[0] = refcount + 1;
}
},
16 => {
if (refcount == REFCOUNT_ONE) {
allocator.free((bytes - 16)[0 .. 16 + data_bytes]);
@ -36,7 +29,14 @@ pub fn decref(
(usizes - 1)[0] = refcount + 1;
}
},
else => unreachable,
else => {
// NOTE enums can currently have an alignment of < 8
if (refcount == REFCOUNT_ONE) {
allocator.free((bytes - 8)[0 .. 8 + data_bytes]);
} else if (refcount_isize < 0) {
(usizes - 1)[0] = refcount + 1;
}
},
}
}
@ -48,23 +48,6 @@ pub fn allocateWithRefcount(
comptime const result_in_place = false;
switch (alignment) {
8 => {
const length = @sizeOf(usize) + data_bytes;
var new_bytes: []align(8) u8 = allocator.alignedAlloc(u8, 8, length) catch unreachable;
var as_usize_array = @ptrCast([*]usize, new_bytes);
if (result_in_place) {
as_usize_array[0] = @intCast(usize, number_of_slots);
} else {
as_usize_array[0] = REFCOUNT_ONE;
}
var as_u8_array = @ptrCast([*]u8, new_bytes);
const first_slot = as_u8_array + @sizeOf(usize);
return first_slot;
},
16 => {
const length = 2 * @sizeOf(usize) + data_bytes;
@ -84,6 +67,22 @@ pub fn allocateWithRefcount(
return first_slot;
},
else => unreachable,
else => {
const length = @sizeOf(usize) + data_bytes;
var new_bytes: []align(8) u8 = allocator.alignedAlloc(u8, 8, length) catch unreachable;
var as_usize_array = @ptrCast([*]usize, new_bytes);
if (result_in_place) {
as_usize_array[0] = @intCast(usize, number_of_slots);
} else {
as_usize_array[0] = REFCOUNT_ONE;
}
var as_u8_array = @ptrCast([*]u8, new_bytes);
const first_slot = as_u8_array + @sizeOf(usize);
return first_slot;
},
}
}